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Distribution of Nickel(II), Cadmium(II) and Copper(II) Chelates of 2-(2-Pyridylazo)-5-methylphenol in Two Phases Separated from Micellar Solution of Nonionic Surfactant

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Abstract

Several metal chelates of 2-(2-pyridylazo)-5-methylphenol (PAP-5-Me) were extracted from an aqueous phase into a surfactant phase which was separated from a micellar solution of poly(oxyethylene)=4-nonylphenyl=ether with oxyethylene units of 7.5 (PONPE-7.5). On the basis of the distribution curves for the respective chelates, the partition constants of the neutral chelates were determined at 293 K at an ionic strength of 0.1 (NaCl). The partition constants were considerably smaller than those expected from the regular solution theory. The partition constants were also dependent upon the kind of metal ions. This fact is probably due to such an ordered structure as liquid crystal in the surfactant phase which can differentiate the size of the metal chelates.

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Authors and Affiliations

  1. Faculty of Engineering, Hokkaido University, Kita, Sapporo, 060, Japan

    Hiroto Watanabe & Tamio Kamidate

  2. Department of Applied Chemistry, Muroran Institute of Technology, Muroran, 050, Japan

    Shigeru Kawamorita

  3. The Government Industrial Development Laboratory: Hokkiado, Toyohira, Sapporo, 064, Japan

    Kensaku Haraguchi

  4. Asahikawa National College of Technology, Asahikawa o070, Japan

    Masahiro Miyajima

Authors
  1. Hiroto Watanabe
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  2. Tamio Kamidate
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  3. Shigeru Kawamorita
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  4. Kensaku Haraguchi
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  5. Masahiro Miyajima
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Additional information

This study was supported by the Grant-in-Aid for Scientific Research (No. 58550481) from the Ministry of Education, Science and Culture, for which the authors are very grateful.

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Watanabe, H., Kamidate, T., Kawamorita, S. et al. Distribution of Nickel(II), Cadmium(II) and Copper(II) Chelates of 2-(2-Pyridylazo)-5-methylphenol in Two Phases Separated from Micellar Solution of Nonionic Surfactant. ANAL. SCI. 3, 433–436 (1987). https://doi.org/10.2116/analsci.3.433

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  • DOI: https://doi.org/10.2116/analsci.3.433

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